/**
 *    Copyright 2009-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.executor.statement;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.List;

import org.apache.ibatis.executor.parameter.ParameterHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.session.ResultHandler;

/**
 * @author Clinton Begin
 */
public interface StatementHandler {//JDBC处理器:封装了JDBC Statement操作，负责对JDBCStatement的操作，如设置参数、将Statement结果集转换成List集合
  //interface
  Statement prepare(Connection connection)
      throws SQLException;/*声明statement*/

  void parameterize(Statement statement)
      throws SQLException;/*设置参数*/

  void batch(Statement statement)
      throws SQLException;/*添加批处理 并非执行*/

  int update(Statement statement)
      throws SQLException;/*执行更新 对应executor执行器的update*/

  <E> List<E> query(Statement statement, ResultHandler resultHandler)
      throws SQLException;/*执行查询 对应executor执行器的query*/

  BoundSql getBoundSql();

  ParameterHandler getParameterHandler();/*获取参数处理器*/

}
